arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0812.1313astro-ph
收藏

密近双星的视向速度研究。XV

Radial Velocity Studies of Close Binary Stars. XV

T. Pribulla, S. M. Rucinski, R. M. Blake, W. Lu, J. R. Thomson, H. DeBond, T. Karmo, A. de Ridder, W. Ogloza, G. Stachowski, M. Siwak

摘要:

径向速度测量和正弦曲线拟合的轨道径向速度变化的最后八个密切的双系统,分析的方式与本系列的前几篇论文相同:QX和,DY Cet,MR Del,HI Dra,DD Mon,V868 Mon,ER Ori和Y Sex。对于另外七个系统(TT Cet、AA Cet、CW Lyn、V563 Lyr、CW Sge、LV Vir和MW Vir),相位覆盖不足以提供可靠的轨道,但测量了各个组成部分的径向速度。在整个DDO近距离双星计划中观测到的一些复杂系统的观测也被提出;其中一个特别有趣的是多系统V857 Her,除了接触双星之外,它很可能包含一个或多个更早光谱类型的次矮星成分。所有被发现最有可能是脉动星的可疑双星简要讨论的平均径向速度和投影旋转速度(v sin i),以及光谱类型的估计。在其中的两个,CU CVn和V752 Mon,加宽函数显示了非径向脉动的明显存在。以前丢失的频谱类型的DDO我的文件在这里给出除了这样的估计大多数的程序星的本文。

英文摘要:

Radial-velocity measurements and sine-curve fits to the orbital radial velocity variations are presented for the last eight close binary systems analyzed the same way as in the previous papers of this series: QX And, DY Cet, MR Del, HI Dra, DD Mon, V868 Mon, ER Ori, and Y Sex. For another seven systems (TT Cet, AA Cet, CW Lyn, V563 Lyr, CW Sge, LV Vir and MW Vir) phase coverage is insufficient to provide reliable orbits but radial velocities of individual components were measured. Observations of a few complicated systems observed throughout the DDO close-binary program are also presented; among them an especially interesting is the multiple system V857 Her which - in addition to the contact binary - very probably contains one or more sub-dwarf components of much earlier spectral type. All suspected binaries which were found to be most probably pulsating stars are briefly discussed in terms of mean radial velocities and projected rotation velocities (v sin i) as well as spectral type estimates. In two of them, CU CVn and V752 Mon, the broadening functions show a clear presence of non-radial pulsations. The previously missing spectral types for the DDO I paper are given here in addition to such estimates for most of the program stars of this paper.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑